最后分析了抽样与哈希技术的长处与不足，提出了多种技术相结合的研究方向。
Finally, we analyze the advantages and disadvantages of sampling and hash techniques and present the future research trend of various techniques combined.
通过几何哈希技术加强兴趣点间的几何约束，以增加正确匹配的兴趣点对数量。
The geometry hashing technic is used to enhance the geometry constraint of interest points in order to improve the matching result.
通过提取文字的特征，结合用户密钥和哈希技术，该方案将文本信息和用户信息嵌入到待传输文本中。
By extracting the features of the characters together with the user secret keys and the hash technology, the scheme embeds the information of the text and the user into the transforming text.
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